You mean everyone in your region. Nobody I knew was on AIM. Everyone was on MSN Messenger.
UK = (mostly) MSN MESSENGER
correct me if i’m wrong.
It makes sense.
Not sure if they were an ISP or something but I do remember their presence in British internet access.
Tech crowd started on ICQ. Masses started to arrive and use MSN.
Honestly, I wouldn't even be able to tell you what AIM was...